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20.11.2020 •
Mathematics
10 bagels and 4 muffins cost 13 dollars and 5 bagels and 8 muffins costs 4 dollars
How much do the bagels cost and how much do the muffins cost?
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Ответ:
The cost of bagel is $0.8 and that of muffins is $1.25.
Step-by-step explanation:
Let the bagels cost is x and muffins cost is y.
ATQ,
10x+4y=13 (1)
5x+8y=14 (2) (it should be 14 instead of 4)
Multiply equation (1) by 2 such that,
20x+8y=26 ...(3)
Now subtract equation (2) and (3).
5x+8y-(20x+8y)=14-26
5x+8y-20x-8y=-12
-15x = -12
x = $0.8
Put the value of x in equation (1)
10(0.8)+4y=13
8+4y=13
4y = 13-8
4y=5
y = $1.25
So, the cost of bagel is $0.8 and that of muffins is $1.25.
Ответ:
Its D
Step-by-step explanation: